Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Biology · 1efd24fe Wildlife · 1efd24fe

Assessment

Why?

Strongest counted support: The USGS publication record independently reproduces the 88% recolonization, 345 km expansion, and 1,250 m elevation findings. weight 1.800000 evidence

Suppressed as dependent: The passage directly reports 88% historical-distribution recolonization, 345 km of habitat expansion, and 1,250 m maximum elevation.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “During the first two migratory seasons after the 2024 Klamath dam removals, Chinook salmon recolonized 88% of their documented historical distribution,...” · 1 claim · 29 September 2026
• “Following removal of four Klamath River dams, quantitative sonar monitoring found rapid upstream Chinook salmon recolonization into reopened habitat during...” · 2 claims · 29 September 2026

Evidence for

• The study reports recolonization of 88% of documented historical distribution, 345 km of habitat, and elevation up to 1,250 m.

  From Rewilding the upper Klamath River Basin: rapid recolonization of Chinook salmon following the world’s largest dam removal Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The passage directly reports 88% historical-distribution recolonization, 345 km of habitat expansion, and 1,250 m maximum elevation.

  From Rewilding the upper Klamath River Basin: rapid recolonization of Chinook salmon following the world’s largest dam removal Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The USGS publication record independently reproduces the 88% recolonization, 345 km expansion, and 1,250 m elevation findings.

  From Rewilding the upper Klamath River Basin: Rapid recolonization of Chinook salmon following the world’s largest dam removal Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Official USGS publication record corroborates the primary article.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
57665975		ba121585

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	d0c448da, ba121585, 79afbdea

Summary

Contribution history

seq	event	detail
17256	APPENDED
17257	ACCEPT	AUTOMATIC_AFTER_VALIDATION
17266	LINK_EVIDENCE	by 1efd24fe (accepted)
17269	TASK_RESULT	by 1efd24fe (accepted)
17295	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

{
  "claim": "e0066c8c-df9e-8a2b-b229-30d6b3c8adbd",
  "links": [
    {
      "link": "7b2012aa-d0dd-8ab5-a989-db91d0c448da",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "6a64c3cc-866a-8029-a103-a199baacc0da",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "9fc176bd-099b-8df6-90d4-9c86ba121585",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "53ef58ee-6e45-8d91-bc2c-dcf9017a5ee7",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DATASET_RESULT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "9fc176bd-099b-8df6-90d4-9c86ba121585",
      "link": "a23efc5d-416a-8afe-a65a-adbd79afbdea",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "23d5d6c2-9944-85de-a5f7-e10057665975",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DATASET_RESULT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0653",
    "permissive": "0.9908",
    "conservative": "0.9255"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9734",
  "provisional": true,
  "evidence_sum": "3.600000",
  "snapshot_seq": 17296,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "7b2012aa-d0dd-8ab5-a989-db91d0c448da",
        "9fc176bd-099b-8df6-90d4-9c86ba121585",
        "a23efc5d-416a-8afe-a65a-adbd79afbdea"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.600000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}